Description
HIMA X-SB01 (Item No.985210207) HIMax System Bus Module & HIMA X-FAN 18 03 HIMax Rack Fan Unit
Core Product Overview
X-SB01 (985210207) is the HIMax rack system bus module. It forms the internal high-integrity communication backbone of the HIMax SIS rack, transferring cyclic safety data between F8650X safety CPUs, power supplies and HIMax I/O modules. It supports single or redundant bus topology, with built-in bus diagnostics, status LEDs and a PADT local service port for SILworX engineering and troubleshooting. TÜV certified for SIL 3.
X-FAN 18 03 is the dedicated fan tray assembly for HIMax racks. It provides forced convection cooling for HIMax Eurocard modules including CPUs, system bus modules and I/O cards. It monitors fan speed and reports fan failure via the system bus to the safety controller. Adequate airflow from X-FAN 18 03 is mandatory to maintain the rated operating temperature of X-SB01, F8650X and other electronics; loss of cooling can trigger module overtemperature faults and SIS trips. Both components are key infrastructure parts of HIMax safety racks for ESD, FGS and HIPPS.
Main Technical Specifications
X-SB01 985210207
- Part Number: X-SB01, HIMA Item No. 985210207
- Manufacturer: HIMA Paul Hildebrandt (Germany)
- Device Type: HIMax System Bus Module
- Safety Certification: TÜV, SIL 3 (IEC 61508 / IEC 61511)
- Interfaces: 2 × System Bus (Up / Down), 1 × PADT service port, 1 × Diagnostic port
- Status LEDs: Run, Error, Stop, Init, Redundancy, Rack link status
- Power Supply: 24 VDC, approx. 0.65 A
- Cooling: Passive, dependent on rack fan airflow
- Operating Temperature: -20°C ~ +60°C
- Humidity: 10%–95% non-condensing
- Protection: IP20
- Form Factor: HIMax Eurocard plug-in module
X-FAN 18 03
- Part Number: X-FAN 18 03
- Manufacturer: HIMA Paul Hildebrandt (Germany)
- Device Type: HIMax Rack Fan Unit
- Function: Forced air cooling + fan speed monitoring and fault signalling
- Power Supply: 24 VDC from HIMax rack
- Fan Quantity: Multiple fans integrated in one tray for 18-slot HIMax rack
- Diagnostics: Fan speed feedback, fan failure alarm reported over HIMax system bus
- Mounting: Dedicated fan tray at top/bottom of 18-slot HIMax chassis
- Operating Temperature Range: Supports full rated temperature envelope of HIMax modules
- Humidity: 10%–95% non-condensing
- Protection: IP20
- Status: Active supported HIMax accessory; spares available as new surplus or refurbished tested units
Same-Series Model Recommendations (8 Models)
- X-SB01 985210207: HIMax system bus module (subject)
- X-FAN 18 03: HIMax 18-slot rack fan tray (subject)
- F8650X 984865065: HIMax main safety CPU
- F8651X: HIMax redundant power supply module
- F8621A: HIMax SafeEthernet communication module
- X-DI01: HIMax digital input module
- X-DO01: HIMax digital output module
- F-CPU01: HIQuad X safety CPU (different platform, not interchangeable)

X-FAN 18 03
Professional Quality Control & Testing Standard Operating Procedures
X- 985210207
- Visual inspection: PCB, edge fingers, LEDs, capacitors, solder joints, part number and TÜV label check
- Backplane power bench test on HIMax rack, 24VDC supply, verify stable rails
- Power-on self-test, read firmware, check for permanent hardware faults
- Daisy-chain bus test: validate Up/Down system bus links and redundancy switchover
- PADT port test, connect SILworX, confirm identification and fault reporting
- Rack communication test with F8650X CPU and HIMax I/O modules
- Thermal soak test to expose intermittent timing or connector defects
- Clean edge contacts, reset configuration, ESD packaging with test certificate
X-FAN 18 03
- Visual inspection of fan tray housing, fan blades, wiring harness and connector
- 24VDC power test, verify fan startup and smooth rotation, no abnormal noise or vibration
- Fan speed signal test: confirm speed feedback and fan-failure alarm to HIMax bus
- Interface test with X- and CPU, verify fan fault is visible in SILworX diagnostics
- Continuous running burn-in to detect early fan bearing wear
- Thermal airflow test in 18-slot chassis to confirm cooling performance
- Connector pin check for corrosion or damage
- Final cleaning, function label, ESD packaging with test report
New / Refurbished Installation Guidelines
- Pre-Installation Safety: Lockout-tagout; isolate 24V rack supply and field safety circuits to prevent unintended SIS trips.
- Rack Pre-check: Confirm HIMax 18-slot chassis, proper protective earth, and compatible backplane.
- X-FAN 18 03 Mounting: Install fan tray in designated chassis position; secure fasteners, connect fan harness to rack bus.
- : Align edge connector with HIMax backplane, insert gently, secure front panel screws; wire Up/Down system bus cables.
- Wiring Best Practice: Use HIMA specified shielded cables for system bus; segregate safety cables from high-power wiring.
- Offline Functional Test: Power rack without field loads; verify X- bus LEDs, PADT communication, fan rotation and fan fault alarm in SILworX.
- Commissioning & Acceptance: Validate full rack communication between CPU and I/O; test cooling loss alarm, archive SILworX project and test records.
Application Scenarios & Product Features
Typical Application Scenarios
- ESD Emergency Shutdown Systems for refineries, chemical plants and offshore assets
- FGS Fire and Gas detection and interlock systems
- HIPPS High Integrity Pressure Protection Systems
- BMS Burner Management for gas turbines and industrial boilers
- 18-slot HIMax safety racks in power generation critical safety interlocks
- Spare replacement, maintenance and retrofit of existing HIMax SIS installations
Core Product Features
X- 985210207
- SIL 3 certified system bus for HIMax safety racks
- Supports mono or redundant bus topology for higher availability
- Up/Down bus ports for multi-rack daisy-chain expansion
- PADT service port for local SILworX maintenance and diagnostics
- Cyclic deterministic safety data exchange between CPU and I/O
- Comprehensive bus fault diagnostics with front panel LED status
- Hot-swap capable only under approved SIS bypass procedures
X-FAN 18 03
- Purpose-built fan tray for 18-slot HIMax chassis
- Provides mandatory forced convection cooling for X-, F8650X and I/O modules
- Fan speed monitoring with fault alarm over HIMax system bus
- Over-temperature protection support for the whole safety rack
- Integrated wiring connector matching HIMax rack infrastructure
- Fan failure diagnostics visible in SILworX for predictive maintenance
Frequently Asked Questions (FAQ)
A1: It may boot for short bench testing, but continuous operation in the field is not permitted. Without the X-FAN 18 03 airflow, modules will overheat and trigger safety faults.
Q2: Can X-FAN 18 03 be used on smaller HIMax racks (non-18 slot)? A2: No, X-FAN 18 03 is designed specifically for the 18-slot HIMax chassis; smaller racks use different fan units.
A3: No, X- belongs to HIMax and uses a proprietary HIMax bus; it cannot be used with HIQuad X hardware.
Q4: Can I replace X-FAN 18 03 while the SIS rack is online? A4: HIMax supports module hot-swap hardware-wise, but loss of cooling may raise overtemperature alarms. Follow site SIS bypass and work permit procedures before fan tray exchange.
Q5: What are common failure modes? A5:
- X-: Edge connector oxidation, ESD damage to bus ports, ageing capacitors, voltage transient induced firmware corruption
- X-FAN 18 03: Fan bearing wear, abnormal noise, loss of speed feedback signal, harness connector corrosion


